Bergmann is the most famous of the Viennese ‘cold painted bronze’ artists. He pays attention to detail and uses vibrant colours wich makes works from his foundry highly prized today by collectors. Taking on his father's foundry, he works on animals figures and also some women in the Art Deco style. Bronzes cast in the Bergman foundry are stamped with a capital ‘B’ placed in a twin handled vase and his sculptures are sometimes also signed ‘Nam Greb’.